It was in the wooden house______ a businessman built by collecting funds______ the great scientist carried out the experiment that made a difference.

A．which; that

B．where; that

C．that; where

D．that; which

转鼓强度指标代表（）。

A.焦炭的冷态强度

B.焦炭的热态强度

C.焦炭在炉内的实际强度

D.全不是